Deep Stall ("Sackflug"); Full Stall; Negative Spin - Gradient Avax XC2 User Manual

- recovery: In normal conditions Avax XC2 recovers normal flight automatically as
soon as the front risers are released. Opening may be assisted by applying the
brakes on both sides simultaneously.

5.3.3. Deep stall ("sackflug")

- initiation: Pull both brakes smoothly until the sink rate increase markedly and the
forward speed reaches almost zero. The pull on the brakes should be controlled
so that the canopy stays inflated and doesn't fall back into a full stall.
- recovery: Avax XC2 cannot stay in this regime of deep stall flight, so after the
brakes are released the glider automatically returns into normal flight. If you need
to, you may accelerate the recovery of the glider by one of two methods: Either
you can pull both brakes intensely followed by a fast release of brakes or you can
pull on the A-risers lightly.
Caution: If you pull on the A-risers too intensely you may experience a frontal
collapse of the leading edge.

5.3.4. Full stall

- initiation: Take one or two wraps of the control lines and pull both of them down
smoothly. Hold them down until the canopy falls behind the pilot and deforms into
a characteristic crescent shape. Hold your hands firmly (press them against the
seat) and be careful that you do not release the brakes prematurely or
asymmetrically
- recovery: Avax XC2 recovers from a full stall automatically after brakes are
fluently released. During correct recovery from a full stall the Avax XC2 shows no
extreme tendencies such as a strong surge in front of the pilot. In the case of the
brakes being released prematurely or too quickly there is a possible tendency for
the glider to surge ahead of the pilot. This can be corrected for by adequate
braking on both-sides simultaneously.
Caution: It is common that when brakes are released asymmetrically a massive
asymmetrical collapse may arise followed by a tendency to enter a spin.

5.3.5. Negative spin

- initiation: Slow down by braking to nearly minimum speed. Then pull a brake on
one side all the way down while simultaneously releasing the brake on the other
side. Because the stalled side falls back, the canopy suffers air flow separation
over one half of the wing which results in a spin and a rapid loss of altitude.